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Question

In a study to determine the rate of the following reaction:

2NO(g) + O₂(g) —> 2NO₂(g)

the concentration of NO was 0.0350 M at t = 5.0 s and 0.0225 M at t = 650.0 s. What is the average rate of the reaction during this time period?

Please help me understand how to answer this problem.

Answer 1

rate of reaction = change in conc/change in time= ( 0.0350-0.0225)/(650-5 ) s

= 0.00001938 M/s